Sequence diagrams: Represents the behavior of related components on the execution of a system (or subsystem). It shows the invocations, returns, paralellization, starts and stops of those participants.

Visual Languages for Specialized contexts…

Electronic Diagrams: Shows electronic components and their arrange on a circuit or board.

Military Plan: Shows the planification for war movements. It considers direction, timing, type and strength of forces in the theater of operations.

Maybe, for any human knowledge area, there are a visual language developed. Plus consider that many organizations have developed their own visual languages, and they are changing over time and evolve following the development on their industries or even creating new ones (e.g.: nanotech, genetic engineering). Such particular well focused dialects are called Domain Specific Languages.